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c17c2db99c
This patch adds the device tree bindings for the Broadcom's BCM6345 memory-mapped GPIO controllers. The gpios will be supported by gpio-mmio code of the GPIO generic library. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
47 lines
1.5 KiB
Plaintext
47 lines
1.5 KiB
Plaintext
Bindings for the Broadcom's brcm,bcm6345-gpio memory-mapped GPIO controllers.
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These bindings can be used on any BCM63xx SoC. However, BCM6338 and BCM6345
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are the only ones which don't need a pinctrl driver.
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BCM6338 have 8-bit data and dirout registers, where GPIO state can be read
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and/or written, and the direction changed from input to output.
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BCM6345 have 16-bit data and dirout registers, where GPIO state can be read
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and/or written, and the direction changed from input to output.
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Required properties:
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- compatible: should be "brcm,bcm6345-gpio"
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- reg-names: must contain
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"dat" - data register
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"dirout" - direction (output) register
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- reg: address + size pairs describing the GPIO register sets;
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order must correspond with the order of entries in reg-names
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- #gpio-cells: must be set to 2. The first cell is the pin number and
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the second cell is used to specify the gpio polarity:
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0 = active high
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1 = active low
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- gpio-controller: Marks the device node as a gpio controller.
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Optional properties:
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- native-endian: use native endian memory.
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Examples:
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- BCM6338:
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gpio: gpio-controller@fffe0407 {
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compatible = "brcm,bcm6345-gpio";
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reg-names = "dirout", "dat";
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reg = <0xfffe0407 1>, <0xfffe040f 1>;
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#gpio-cells = <2>;
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gpio-controller;
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};
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- BCM6345:
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gpio: gpio-controller@fffe0406 {
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compatible = "brcm,bcm6345-gpio";
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reg-names = "dirout", "dat";
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reg = <0xfffe0406 2>, <0xfffe040a 2>;
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native-endian;
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#gpio-cells = <2>;
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gpio-controller;
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};
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